I reckon you may mean 'Seal-Guard'. Comes in an aerosol bottle, (yes, it does stink, but IMO absolutely brilliant stuff - open the window, hold your breath for a l-o-n-g time and then get out!) or as a brush on I haven't tried. Apart for the stink very convenient to use, can be applied 20 minutes after grouting, seals while allowing grout to dry, does not need polishing off and gives the surrounding tiles a touch more depth. Anyone who has ever struggled with moldy shower alcoves, well, a must have IMO. It is toxic to the environment (aquatic life, don't dump it in the river), but probably balances out against all the toxic stuff we use to try and get rid of mold over time. Google sealguard and you find a supplier.